Dust-collector



2 sheets-sheet 1.

(No Model.)

A. HUNTER. DUST GOLLEGTOR.

No. 449,535. Patented Mar. '31, 1891.

w: nonms Pumas 00., PHOYO-u'mmnI/AsmMGTun, a c.

v(No Model.) 2 Shee ts -Sheet 2.

A. HUNTER.

DUST COLLECTOR.

N0. 449,535-. Patented Mar. 31, 1891..

NITED STATES PATENT OFFICE.

ousT-coLLecTo R.

SPECIFICATION forming part of Letters Patent No. 449,535, dated March31, 1891.

Application filed March 14,1890.' Serial No. 343.824. (No model.)

To all whom it may concern:

Be it known that I, ANDREW HUNTER, of Milwaukee, in the county ofMilwaukee, and in the State of \Visconsin, have invented certain new andusefulImprovements in Dust- Collectors; and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention relates to dust-collectors; and it consists in certainpeculiarities of construction, as will be fully set forth hereinafterand subsequently claimed.

In 'the drawings, Figure 1 is a vertical central section through themain part of my device, with parts broken away and parts shown inelevation. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1.Figs. 3 and 4 are details of construction. Fig.5 is a plan view, partlybroken away, of the upper part of my device, showing additional valvesapplied thereto; and Fig. 6 is a vertical central section of the samepart.

My machine consists, primarily, of a double cylinder, preferably ofmetal, the upper part A being of less diameter than the lower part B,and for convenience I will hereinafter allude to said parts as cylindersA and B, the upper one being provided with a central openended circulartube 0, preferably of metal, extending from the line of the top to thebottom line of said cylinder A, there being an annular plate D,preferably of wood, surroundin g said tube 0 at its top and suitablysecured thereto, as by nails or screws a, said plate D filling up allthe space at the top between the tops of the parts A and C, and beingsecured to the cylinder A, as by nails or screws b. Above this isanother annular plate E, (also preferably of wood,) which rests on andprojects beyond the top edge of the cylinder A, the plate E beingsuitably secured to the plate D, as by screws 0 c. The plates D E areout through at the point cl to receive the lower end of the air-inletspout F. The lower end of the cylinder A is surrounded by an annulus G,(preferably of wood,) secured thereto, as by nails or screws 6 andresting on the top edge of the cylinder B, and secured, as by screws f,to another annulus II, (also preferably of wood,) surrounding theoutside of the. top of the cylinder B and secured thereto, as

by nails or screws 9. The lower part of the cylinder B is secured, as byscrews or nails h, to an annulus I, which latter is secured aboveanother annulus J, (both preferably of wood,) as by bolts 2', passingthrough both parts I and J and through the flange k of a (preferablymetallic) inverted conical chamber K and securing-nuts j.

The object of the described means of attachment of the several parts A,B, and K is to render them readily separable and detachable whenrequired for cleansing, repair, or other purpose.

The space in the upper cylinderAbetween its inner Wall and the outerwall of the tube 0 is divided bya continuous flooring or partition minto a circuitous air-trunk L, which starts from just below the openingd at the base of the air-inlet spout F, (where there is a curveddeflecting-plate m to direct the dustladen currents of air into saidtrunk L,) and passes around on a line with the top of the cylinder A towithin a short distance of the point whence it started when it forms aninclination equal to the depth of the air-trunk, and then again passesaround horizontally on a lower plane until it again reaches a pointopposite the line of its last downward deflection, where said floorends, as shown at m The lower cylinder B is provided with a series ofradiating partitions M, (preferably of wood,) extending inward from thewall of said cylinder to a circular line practically in line with thatof the tube 0 above, the outer edge of said partitions being held to thewall of the said cylinder, as by screws m m The surfaces of saidpartitions are preferably partly covered with hanging cloths n, (such asburlaps,) just tacked to the upper ends of the same, as shown at n inFig. 1, and which as they hang closely against the surfaces of saidpartitions cannot well be represented in Fig. 2, while the inner edgesof the said partitions M may rest against and be secured in any suitablemanner to a metallic or other ring N, and at the top of said inner edgesof the said partitions M there isanother ring N, both of these rings N Nbeing provided (in the construction shown in the present drawings) withradially-projecting screw-eyes a 11. which receive vertical pintles onthe top and bottom adjacent edges of the vertical gates or valves 0,(although this hinge-connection may be made in any suitable mann er,)said edges of said gates being in line with the inner edges of the saidradial partitions M, which latter are preferably provided each with anL-shaped projection P.

Q. is a cross-piece secured on top of the plate E and extending acrossthe top opening of the tube 0 and provided with a central perforation q,through which projects downward a suspending rod R, the top of which issecured to the hub of a quadrant-shaped lever R, provided with anarc-slot *1", for the reception of a bolt "1", passing through the saidcross-piece Q and having a thnmb'nut r on its upper end. The lower endof the rod Rearries a disk R held in place by means of a collar R andset-screw 0' and said disk is provided near its periphery on its uppersurface with a series of pins 0' 0, each of which is received in the eyeof a rod S, whose other end is bent or hooked, as shown at s, to engagewith a staple 0 on the lower part of the adjacent face of one of thegates or valves 0.

The upper inner part of each of the radial partitions M is cut away toreceive the side edge of a rounded or inclined deflecting-band T, whichmaybe either dish-shaped, as shown in the drawings, or conical withoblique sides, as preferred, the lower opening of said band being inline with the tube 0 above and the inner vertical edges of thepartitions M below, while the upper edge of said band extends to acircular line about midway between the bases of the tube 0 and uppercylinder A and forms, with the tops of the partitions M, the open bottomof the said cylinder.

U is an inverted conical chamber, provided with a small opening at thebase, as shown at u, and having a flange u at the top, preferablysecured to the bottom edges of the partitions M, and projecting downinto the similar inverted conical chamber K, which latter has adust-outlet V at its bottom controlled by a trap-door \V, hingedthereto, as shown at 1:, said trap door \V being controlled by a spring'20, having a loose bearing-point at v and an adj usting-screw w, asshown in Fig. 1, so that by screwing the screw in the free end of thespring will lower and permit the free end of the trap-door \V to fall,while a reverse motion of the said screw will raise said free end of thespring and permit it to close said door.

In Fig. 1 I have shown my circuitous airtrunk L as wholly unobstructed;but in Figs. 5 and b I have shown a series of vertical rods X, (whichmay be suitably journaled in vertical bends c of the tube 0,) and whosetops pass through the plates D E and above the latter receivequadrant-shaped levers Y, having areslots y for the reception of bolts 3passing through said plates D E and having thumb'nuts 11 on their upperends and a series of vertical segmental gates or valves 71 Z, whoseinner ends are bent around said rods X, as shown at z .2, said gatesbeing located within the circuitous air-trunk L, as shown, whereby thepassage in the said airtrunk may be more or less restricted, whendesired, to compress the air in its passage.

The operation of my device will be readily understood from the foregoingdescription of its construction. The dust-laden air enters themachinethrough the air-inlet spout F and travels rapidly through thecircuitions air-trunk L. The specific gravity of the dust being heavierthan the air causes the former to be thrown against the inner wall ofthe cylinder A and kept always in contact therewith during its passagefrom the top to the bottom by the force of the air until it reaches apoint where it drops into the cylinder B, which cylinder, being largerat that point, releases the air-pressure and allows the separated dustto fall down into the dead-air chamber K and out through the dust-outletV, whose springcontrolled trapdoor W' prevents the air from escaping atthis point also, which air, now free from dust and adjacent to the wallof the cylinder B, finds an easy egress between the radial partitions Minto the central space between them and up and out through the tube 0,while the air which was originally adjacent to the outside of said tube0 and free from dust (the dusty air, as already explained, being forcedagainst the wall of the cylinder A in its passage through thewind-trunk) is deflected inwardly by the band T and passes up and outthrough the tube C without ever going into the lower cylinder 15. As thedust drops down from the cylinder B and the air leaves it to enterbetween the radial partitions M, the air is forced against the latterand the L-shaped projections P thereon break the current and prevent it.from carrying dust to the outlets guarded by the gates O and interceptthis dust, which will drop down into the dead-air chamber K beneath, andif any dust escapes these projections P it will adhere to the describedhanging cloths a, and when said cloths are loaded the dust will drop bygravity down to said chamber.

The function of the chamber U is to receive (and. discharge at itsorifice it) any foreign matter which might possibly drop into themachine from above, and the opening a is made very small, so as toprevent forming a current from below up through the central air-openingof the machine.

The object of the gates O is to regulate the openings between thecentral chamber and the chambers formed by the radial partitions M,leading into the center of the machine, thereby controlling thedischarge of the air, either by compressing it when the current is tooweak or opening out said gates when the current is strong, which is doneby a movement of the lever B in the required direction.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- IIO 1. In a dust-collector, thecombination, with a dust-collecting chamber, of a double cylinder abovethe same, the upper portion of said cylinder being of less diameter thanthe lower part, a central open-ended vertical tube within said upperpart, a circuitous air-trunk surrounding said tube and communicatingwith said lower part of the double cylinder, and a series of radialpartitions extending toward the center of said lower part, substantiallyas set forth.

2. In a dust-collector, the combination,with a dust-collecting chamber,of a double cylinder above the same, the upper portion of said cylinderbeing of less diameter than the lower part, a central open-ended tubewithin said upper part, a circuitous air-trunk surrounding said tube andcommunicating with said lower part of the double cylinder, a series ofradial partitions extending toward the center of said lower part, aseries of gates or valves hinged to the inner edges of said radialpartitions, and a shifting-lever and a series of rods connecting saidgates or valves therewith for simultaneously operating said gates orvalves, and thereby controlling the openings between the central chamberand the chambers formed by the said radial partitions, substantially asset forth.

3. In a dust-collector, the combination, with a dust-collecting chamber,of a double cylinder above the same, the upper portion of said cylinderbeing of less diameter than the lower part, a central open-ended tubewithin said upper part, a circuitous air-trunk surrounding said tube andcommunicating with said lower part of the double cylinder, a series ofradial partitions extending toward the center of said lower part andhaving gates or valves hinged to their inner edges, a cross piece abovesaid upper part of the double cylinder, a rod suspended therefrom andextending down through the center of both parts thereof, a plate on thebottom thereof,'aseries of rods connecting said plate with the saidhinged gates, and an operating-leveron the suspended rod, substantiallyas set forth.

4. In adust collector, the combination, with an upper cylindercontainingan air-tube and surrounding air-trunk, of a communicating lower cylindercontaining a series of radiallyarranged vertical partitions and adead-air chamber below said lower cylinder, substantially as set forth.

5. Ina dust-collector, the combination,with an upper cylinder containingan open-ended air-tube and surrounding air-trunk, of a communicatinglower cylinder of increased diameter containing a series ofradially-arranged vertical partitions and a series of vertical angularprojections extending from said partitions, substantially as set forth.

6. In a dust-collector, the combination, with an upper cylindercontaining an air-tube and surrounding air-trunk, of a communicatinglower cylinder of increased diameter containing a series ofradially-arranged vertical partitions having a series of gates or valveshinged to their inner edges, and a rod and lever, and connecting-rodsfor simultaneously operating the same, substantially as set forth.

7. Inadust-collector, the combination,with a dust separating andcollecting section, of a cylinder above the same, a central open-endedvertical tube within said cylinder, a circuitous air-trunk occupying thespace between said cylinder and tube and communicating with the sectionbelow, a series of gates or valves within said air-trunk, a rodextending through said cylinder and secured to said gates or valves, andan operating-lever on said rod, substantially as set forth.

In testimony that I claim the foregoing I- have. hereunto set my hand,at Milwaukee, in the county of Milwaukee and State of WViscousin, in thepresence of two witnesses,

ANDREW HUNTER. Witnesses:

1-1. G. UNDERwooD, WM. KLUG.

